posted by James on .
Volunteers working to raise funds for a new community library sold 1000 raffle tickets at $10 each. Tickets are to be randomly drawn and prizes are awarded as follows: one prize of $1,000, twenty prizes of $50 and one hundred prizes of $20. What is the expected value of this raffle to you if you buy just one ticket? What is the expected value of this raffle if you buy all of the tickets?